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3 years ago

Can someone explain this a little better?

Mathematics

1 answer:

galina1969 [7]3 years ago

4 0

Answer:

i believe 0.67 of a chance

Step-by-step explanation:

since there are two jobs and a chance that he won't get either that's three options. so the denominator is three (as a fraction). there are two jobs so the probability of James getting one of the two is 2/3. 2/3 as a decimal is 0.66666 and keeps going on and on forever. Rounded to the nearest hundredth, 0.666666 is 0.67.

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Seven customers enter a clothing store and are observed to determine if they will make a purchase. The store owner states that t

blondinia [14]

Answer: Mean = 5.25

Variance = 1.3125

Standard deviation = 1.456

Step-by-step explanation:

The mean and variance of a binomial distribution with parameters n (number of trials) and p ( the probability of getting success in each trial) is given by :-

$\text{Mean}=np\\\\\text{Variance}=np(1-p)$

Given : The total number of enter a clothing store : n=7

The probability of a customer making a purchase= 0.75

Now,

$\text{Mean}=7(0.75)=5.25\\\\\text{Variance}=7(0.75)(0.25)=1.3125\\\\\Rightarrow\ \text{Standard deviation}=\sqrt{1.3125}=1.14564392374\approx1.1456$

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3 years ago

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Step-by-step explanation:

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2 years ago

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What is the perimeter of a rectangle whose length is -3x + 4 and a width of 5x - 2?

denpristay [2]

Answer:

Step-by-step explanation:

Perimeter = 2*(length + width)

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3 years ago

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Solve this equation using the radical equation method

Yuki888 [10]

The domain:
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$Answer:\ \boxed{x=-1.25\ \vee\ x=-1}$

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3 years ago

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Rufina [12.5K]

Answer:

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